Improvement in machines for drilling and tapping gas-fittings



To all whom it muy concern.-

. chinery.

n? -d1tted N tatea parte aan.

Ymerrain) CRANE; or CHICAGO, ILLrNois.

Letters Patent No.` 100,731, dated March 15, 1870.

IMPROVEMENT 1N MACHINES Fon DRILLING ANDKTAPPING GAS'FITTINGS.

` The Scledirle referred to in these Lettera Patent and making part ofthe same.

Be itknown that Lltrorrlrnn T. CRANE, of the city of Chicago, in thecounty of Cook, and State of Illinois, 4have invented 4certain' new anduseful Improvements 1n Chucks; and I do hereby declare that thefollowing'is a f'nll,'clear, and exact description thereof, referencebeing had to the accompanying drawings making a part of thisspecification, in \whiche Figure-1 is an `isometric view;

Figure 2, a plan view` of' the base with viscs re# moved;

Figure 3,a p erp and Figure 4, a vertical section of the same.

ndicular ricw of one vise detached;

Like letters refer to the same parts in all of the figures. t

Thcnatiue of' my invention consists in the combination of'ftw'o movablechucks or vises for holding gas or steam-fittings, and presenting thesame to the 'i drillingor tapping-toolswith two or more drills or``taps, in such a manner that, on the withdrawal of one chuck with itsdrilled or tappedfitting from thedrilling or tapping tools, the otherchuck, being in readiness with another fitting, may bemoved andaccuratelyr guided into thesameposition as that from' vhch the firstchuck had just been removed.

yTo enable others skilled in the art to make and use myimproved chuck I-will describe its construction d, operation. Y In the drawings` i fr Arepresents the platform or bed of' the machine, either as may be desiredin constructiolt` B B represent the guides' or run-ways of' the rises.

` C C, the beds upon which the vises are placed.

D D, thepostsor standards of'- the-rises.

`E, theupper, and F, the lower jaws of" the vise.

I, the space between them, -cut away so as to conform to theconfiguration of the fitting.' D, the dovetailed projections fitting theguide' ways B. 4 1 H, the screw, by which the jaw E is elevated or depressed, so as to disengage or hold the fittings.

J, the collar, by means of' which thc screw H is held in place whenpressure is obtained.

K K represent standards or post-s, by or through which propel'- taps ordrills are inserted, and Il, taps or"4 'drills which are `operated by`any suitable ina- Machiues ofthis class are usually made entirely of,

I iron, andthe chuck can be placed upon the bed-plate `of the entiremachine, or upon its own bed or plat- Y fmn,

as may be desired. The guide-ways B are placed on thisV bed, and atangles sufiicient to allow the two vises to pass each vother withoutinterference. V u f .The dovetailed projection G fits into the grooveof' the( guide yB and slides'therein, and when placed yi-n position for'tapping or drilling the iront yend strikes4 against the point M, whichoperates as a stop 4to and holds the vise in exact position. Theguide-ways beat an angle withtheline of' pressure 4from the taps ordrills, the vise will remain in position when' ing three taps are used,but when one ortwo are used a back stop will be required. The plates Care fitted the dovetailed projections G beneath them run nearly or quitetheir entire length. the standards D are placed. To these standards thejaws E and'F are attached, the lower one, F, permanently, and the upper'one movably.'

The faces of' these jaws are fitted to confor-in. tov the piece of metalinserted, and for any considerable, variation in the size of' the piecesto be tapped on drilled, I'usually change the vses, but the 'lower jawmay be made adjustable, if desired, so that the same vise can be used inall kinds of -work.

In lifting the jaw E the screw H rests upon its lower end, and indepressing it the pressure isupon thc-collar J. v

These vises, when in place, stand square with the machine, as shown atfig. 1, and as they slide without v much friction in the guide-ways,they are easily operated by any suitable handle or knob attached totheback of vthe posts D or to tbe plates C.

By the use of this chuck the machine ls'kelt steadily at work, as, whilethe fitting in onev vise is "beingl tapped, one previously tapped istaken from'the other and a fresh blank inserted, when the one at the tapis withdrawn, and the other slid forward int-o position tov receive thetaps, vand so on as long as the machine continues to run. a

When the plate or bed a is placed in a vertical position, and the tap inthe part K is in a verticalposition, as such machines are sometimesmade, then it will be advisable to operate the separate visesof thechuck with suitable foot-levers. I

Having thus fully described my improved chuck, What l claim as new, andde sire to secure by Letters Pat-ent, is

The combination of two or more drilling or tappingtools with two chucksor vises, and guide-ways for the same, converging inv such manner thatthe chucks may be alternately guided by them to one and. the sameposition in relation to thctools, substantially as def RICHARD T. CRANE.

- scribed.

Witnesses:

L. L. BOND.

U. W. BOND.

over the guideways,and'

Near the front end of'- each

